Glutjd



' sulphureted by form Ram May 24, 1927.

UNITED STATES. PATENT OFFICE.

Wm GLUUD, 0F DOBTIUND, emmniy, ABBIGHOB TO 'rn KOPPEBB comm,

OF PITTSBURGH, PENNSYLVANIA, A

CORPORATION OF PENNSYLVANIA.

n'rnon 01' REMOVING SULPHUR-BT13) HYDROGEN FROM GASES.

No Drawing. Original application flied September 11, 1922, Serial No. 587,581, and in Germany September 20,1921. Renewed m 24, 1926. Original Ho. relelae llled larch 7, 1827. Berta] no. 178,694.

It has alread been proposed to extract rogen from gases by'means of cop r-salt-solutions;'tlie copper sulphide formed lieing then recon'verted intoa' soluble and the washingrliquid being regenerated by treating with air. The fact has now been established that besides co er, also nickel may be converted into a so u 1e form from its-sulphides by being treated with oxygen or oxygenous gu'ses' orniixture of gases, such, for instance, as air.

Employing nickel instead o'fcopper for the urpo'se in view yields great technical pro ts, quite apart from the further fact that a novel property of nickel has been discovered. It has been found that the decomposition of the nickel sulphide proceeds mostly in thisway that the sulphur bound to' the nickel is separated as elementarysulphur. Besides, the reaction between the air and the nickel proceeds ui'cker than with copper, in consequence of w ich, in carrying the process through technically, the units necessary for the regeneration of the washing liquid may be considerably smaller whereby a considerable profit is obtained.

The process ma be carried through in ver many ways y either addin or not ad ing, substances of certain kinds to the nickel-salt-solution. 'Such substances may be, for instance, such salts, bases and the like, which do not cause a precipitation of' the nickel from its solutions viz, ammonia, pyridine, ammonium sulphate, ammonium chloride, sodium chloride salts of organic acids, etc. Washing the gas and treating the liquid with air may be effected at ordinary temperature or at a higher one, and the air may have atmospheric pressure or a lower or a hi her one. In this latter case, the carryin t rough of the process is considerably acce erated.

Example.

A gas containing suiphureted hydrogen is passed into a solution of 1,2 per cent of nickel-sulfate, 2 per cent of ammonia and 3-10 per cent of ammonium-sulfate, until the greater part of the nickel has been precipitated. A rapid current of air entering at the bottom of the liquid is then passed through the solution. After some time the black sulphide has disappeared and 1,597,864, dated August 31, 1928. Application for invention, it does not exclude nickel in other forins or compounds or its being otherwise contained in a washing liquid or solution to extract sulphureted hydrogen from gases. My invention, therefore, is not limited to the specific instance described by way of example but may be vnriouslypracticed within-the scope of the claims hereinafter made.

Having now described What I claim as new and desire to secure by Letters Patent of the United States is:

1. The process of removing sulphureted hydrogen from gases which consist in subjecting the as to the action of a nickel-salt solution an treating the sulphide obtained thereby with a gas containing oxygen.

2. The process of removing sulphureted hydrogen from gases which consists in subjecting the gas to the action of a nickel-salt solution in presence of substances able to form nickel-compounds which are soluble in alkaline li uids and precipitable by hydrogen sulphi e and treating the sulphide obtained in the liquid with a gas containing oxygen.

3. The process of removing sulphureted hydrogen from gases which consists in subjecting the gas to the action of a nickel-salt solution in resence of ammonia and treating the sulp ide obtained in the liquid With a gas containing oxygen.

4. The process of removing sulphureted hydrogen-from gases which consists in subjecting the gas to the action of a. nickel-salt solution in presence of a salt which is incapable of precipitating the nickel from the S0 ution and treating the sulphide obtained in the liquid with a gas containin oxygen.

5. The process of removing an phureted hydrogen from gases which consists insubjecting the gas to the action of a nickel-salt form nickel-compounds which are soluble in alkaline liquids and preci itable by hydrogen sulphide and of a sa t which is incapable of precipitating the nickel from the solution and treating the sulphide obtained in the liquid with a gas containih oxygen.

6. The process of removing su phureted hydrogen from gases which consists in sub jecting the gas to the action of a nickel-salt solution in presence of ammonia and a salt; which is incapable of precipitating the nickel from the solution and treating the sulphide obtained in the liquid with a gas containing oxygen.

7. The process of removing sulphnreted. hydrogen from gases which consists in subjecting the gas to the action of a nickel-salt solution in presence of salts which are incapable of precipitating the nickel from the solution and treating the sulphide obtained in the liquid with a gas containin oxygen.

8. The process of removing su phureted hydrogen from gase which consists in subjecting the gas to the action of a nickel-salt solution in presence of substances able to form nickel-compounds which are soluble in alkaline liquids and precipitable by hydrogen sulphide and of salts which are incapable of precipitating the nickel from the mlution and treating the sulphide obtained in the liquid with a gas containin oxygen.

9. The process of removing su phuretcd hydrogen from gases which consists in subjecting the gas to the action of a nickel-salt solution in resence of ammonia and salts which are lncapable of precipitating the nickel from the solution and treating the sulphide obtained in the liquid with a gas containing oxygen. t

10, The rocess of removing sulphureted hydrogen rom gases which consists in sub- 7 pound.

jecting the gas to the action of a solution containing nickel and convertin the nickel bound to sulphur a ain into solu 1e form by treating the sulphi e in the liquid with gases containing oxygen at a temperature other than normal.

11. The proce:s of removing sulp'hureted hydrogen from gases which consists in subjecting the gas to the action of a solution containing nickel and convertin the nickel bound to sulphur a ain into solu is form by treating the sulphi e in the liquid with gases containingoxygen under a pressure other than normal.

12. The process of removing sulphureted hydrogen from gases which consists in sub jecting the gas to the action of a solution containing nickel and convertin the nickel bound to sulphur again into solu le form by treating the sulphide in the liquid with gases containing oxygen of a pressure and at a temperature other than normal. 1

13. The process of removing sulphureted hydro en from gases which comprises the use oi a solution containing a nickel coin- 14.. The PIOLGlS of reriioving sulphureted hydrogen from gases which consists in subjcctin the" gas to a solution containing a niche compound and then treating the sulphide obtained with a gas containin oxygen.

1.5. The process of removing su phureted hydrogen from gases which consists in subjecting the gas to a solution containing nickel and then regenerating the solution oxidation.

In testimony whereof, I have hereunto subscribed my name this 12th day of January,

1927. WILHELM GLUUD.

CERTIFICATE OF CORRECTION.

Reissue Patent No. 16,631. Granted May 24, 1927, to

W ILHELM GLUUD.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, line 46, for "1.2" read "1.5" and line 56, for "1,2-2 m." read "1.5-2 m."; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 14th day of June, A. D. 1927.

. M. J. Moore, Seal. Acting Commissioner of Plltenta. 

